CN1457128A - Power supply device and its designing method, generator thereof - Google Patents
Power supply device and its designing method, generator thereof Download PDFInfo
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- CN1457128A CN1457128A CN03123525A CN03123525A CN1457128A CN 1457128 A CN1457128 A CN 1457128A CN 03123525 A CN03123525 A CN 03123525A CN 03123525 A CN03123525 A CN 03123525A CN 1457128 A CN1457128 A CN 1457128A
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- transformer
- supply unit
- frequency
- electromotive force
- vibration
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/337—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
- H02M3/3376—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current
Abstract
Although increasing the switching frequency is effective to downsize a power supplying apparatus, the switching loss of a switching element increases if the switching frequency is increased. In a power supplying apparatus including a transformer having a very high boosting ratio, and a plurality of switching elements for supplying AC power to the primary side of the transformer, the frequency of the AC power is set to 0.25 to 2 times the self-resonance frequency of the transformer.
Description
Technical field
The present invention relates to supply unit and method for designing thereof, Blast Furnace Top Gas Recovery Turbine Unit (TRT), particularly relate to the supply unit of the direct current power that conversion provides by solar cell.
Background technology
The practicability of solar power system develops rapidly, and a lot of solar power systems are used on market.They are the supply units with the efficient electrical power converting means that uses solar cell and switch element.
Fig. 1 is the figure of the circuit structure of expression battery power.The output of solar cell array 91 comes boosted voltage by boost converter 92, is converted to alternating electromotive force by converter 93, offers commercial power system (below be called " system ") 9.
In order to make described converter or transducer miniaturization, the high frequencyization of switching frequency is effective.Even in battery power, in order to make miniaturizations such as transformer, inductor, smmothing capacitor, the high frequencyization of having attempted switching frequency.But if make the switching frequency high frequencyization, then the switching losses of switch element increases.
Increase this problem in order to solve switching losses, can consider to adopt the on-off mode of resonance type, but under the situation of the battery power that load changes easily, be difficult to the switch timing controlled on the zero point of curtage.Therefore, do not adopted the battery power of resonance type on-off mode in the commodity of selling on the present market.
Summary of the invention
The existence of problem in view of the above, the object of the invention is: the conversion efficiency that improves supply unit.
For realizing described purpose, the preferred embodiments of the present invention disclose a kind of supply unit, and it has: the transformer that step-up ratio is high; Provide a plurality of switch elements of 0.25～2 times alternating electromotive force of the natural frequency of vibration of transformer with an elementary side to transformer.
In addition, other purposes of the present invention are: the high supply unit of conversion efficiency is designed easily.
For realizing described purpose, the preferred embodiments of the present invention disclose a kind of method for designing, it is the method for designing of supply unit that has the high transformer of step-up ratio and a plurality of switch elements of alternating electromotive force are provided to the elementary side of transformer, wherein, be 0.25～2 times of the natural frequency of vibration of transformer to the Frequency Design of alternating electromotive force.
By the explanation of carrying out below in conjunction with accompanying drawing, with clear and definite other features and advantages of the present invention, in the accompanying drawings, identical represents same or analogous part with reference to character.
Description of drawings
Following brief description accompanying drawing.
Fig. 1 is the figure of the circuit structure of expression battery power.
Fig. 2 is the figure of circuit structure of the battery power of expression embodiment.
Fig. 3 is the block diagram of the structure of expression grid drive circuit.
Fig. 4 is the figure of the wiring of expression when measuring the natural frequency of vibration of transformer.
Fig. 5 is the figure of expression to the measurement result of the conversion efficiency of switching frequency.
Fig. 6 is the figure of circuit structure of the battery power of expression embodiment 2.
Fig. 7 is the figure of expression to the measurement result of the conversion efficiency of the switching frequency of embodiment 2.
Fig. 8 is the figure of circuit structure of the battery power of expression embodiment 3.
Fig. 9 is the figure of expression to the measurement result of the conversion efficiency of the switching frequency of embodiment 3.
Figure 10 is the table of the transformer specification of expression embodiment 1.
Figure 11 is the table of the transformer specification of expression embodiment 2.
Figure 12 is the table of the transformer specification of expression embodiment 3.
Embodiment
Below, describe the device of solar generating of embodiments of the invention in detail with reference to accompanying drawing.
[summary]
The inventor has pursued the possibility of miniaturization, high efficiency in the Switching Power Supply mode of off-resonance type.Its result reduces the input voltage of converter as can be known, improves the natural frequency of vibration of transformer, by driving the switch element that is connecting transformer with the switching frequency of describing later, can realize the miniaturization and the high efficiency of supply unit.In the past, about the electrical characteristics that exist with ... transducer configuration and the relation of switching frequency, do not have the opinion determined, half is to decide switching frequency by experience.But, by inventors' research with keen determination, the clear and definite Simple Method for Design that is used for obtaining high conversion efficiency.
Fig. 2 is the figure of circuit structure of the battery power of expression embodiment.
[solar cell]
In solar cell 1, used the thin film solar cell of stacked unformed layer and micro-crystallization layer.The performance of solar cell 1 is at strong sunshine (frequency spectrum AM1.5,100mW/cm
2, 55 ℃ of battery temperatures) under, electricity is output as 1.0V, 10.0A.It doesn't matter with essence of the present invention for the installation methods of the structure of such lamination solar cell and manufacture method, current-collecting terminals etc., thus omit detailed explanation, but open in the flat 11-243219 communique and the spy opens in the flat 8-139439 communique etc. and discloses the spy.In addition, to the kind of solar cell without limits, also can be the silicon metal solar cell.Promptly can select to obtain the solar cell of needed output according to the electric power that should offer load.It should be noted that progressive recently significant fuel cell also has and similar output voltage of solar cell (about 0.5V～1.5V) and electric current (existing with ... area), the inscape that can be used as embodiment adopts.
[power transformation circuit]
As the mode of the elementary side of power transformation circuit, in an embodiment, adopt the on-off mode of recommending of off-resonance type.Because the voltage of solar cell 1 is low to moderate 1.0V, so switch element 3a and 3b are used MOS FET (International Rectifier company makes, model be the product of IRF P3703).In order to keep low loss at low-voltage region, low-resistance switch element is necessary, in fact, has only the MOS FET as unipolar component that the choice is arranged.If the voltage of solar cell 1 is higher, can also use bipolar cell resemble IGBT.The grid input impedance of MOS FET and IGBT is high, also is convenient to simplified driving circuit.
For the input power supply power transformation circuit is regarded voltage source as, input capacitor 2 is used 6.3V, the 1000 μ F electric capacity (trade name OS root (コ Application)) of Sanyo Electric manufacturing.The equivalent serial resistance of OS root (ESR) is very low, and high frequency characteristics is also very excellent, so be suitable for embodiment.In addition, also can use the little capacitors of ESR such as monolithic ceramic capacitor and tantalum electrolytic capacitor.Utilize input capacitor 2, the input power supply of power transformation circuit is regarded as voltage source, power transformation circuit becomes so-called voltage-type (Voltage Source) transducer.
Fig. 3 is the block diagram of the structure of expression grid drive circuit 11.Signal source 41 is have 50% fixing conduction ratio in order to simplify, the to make circuit (LTC1799 that linear (linear) technology company makes) of square wave oscillation of (pulse has 1 or 0 two kind of level, and conduction ratio is meant that impulse level is 1 shared ratio).Square wave by signal source 41 outputs, by converter (the CMOS logic IC that works as buffer, model 74AC04) 42a and 42b, by passing through 6 converter (CMOS logic IC, model 74AC04) current amplifier that constitutes in parallel amplifies, as 2 gate signal outputs driving switch element 3a and 3b, that phase place is opposite.It should be noted that except such structure, the operational amplifier of selling on the market etc., a lot of well-known circuit also can use as grid drive circuit 11.
[rectification circuit]
Inductor 6 uses the surface mounting inductor of selling on the market (coil process company makes, 2.2 μ H).Output capacitor 7 is used the electrolytic capacitor of selling on the market (400V, 220 μ F).These selection of components have no particular limits, and can carry out the consideration that what is called designs according to output voltage, output current, switching frequency, select suitable commercially available prod.
[transformer]
From the inventor's result of study as can be known, transformer 4 is the high transformer of the natural frequency of vibration preferably.When constituting such transformer,, specifically, wish to reduce the number of turn of coil in order to reduce parasitic capacitance (stray capacity).But if reduce the number of turn, then the magnetic flux density of magnetic core will increase, thereby iron loss increases, so if do not increase magnetic core, then the efficient as transformer will descend, generation can't obtain small-sized and this new problem of power-converting device efficiently.Therefore, the inventor is conceived to: by the voltage of an elementary side of transformer is suppressed is low-voltage (specifically, below 2.0V), makes magnetic core become so not big, thereby can suppress the number of turn.
Be below the 2.0V promptly, the number of turn of primary coil is suppressed at about 1～5, can obtain the high transformer of efficient by making the voltage on the primary coil that is added to transformer 4.And, if suppress the number of turn of primary coil, also just suppressed the number of turn of secondary coil, thereby can suppress to parasitize the parasitic capacitance in the transformer 4.
And in the sun-generated electric power of the input coupled system of usefulness low-voltage, the turn ratio of primary and secondary coil (transformation ratio) increases, and is necessary that making the number of turn of secondary coil is more than 100 times of the number of turn of primary coil.Therefore, also there is the tendency of raising in the inductance of coil self, but by suppressing the number of turn of primary coil, the number of turn of secondary coil is reduced, and just can suppress the inductance of coil self.
The natural frequency of vibration of transformer 4 (self-resonant frequency) preferably 10kHz still is more preferably 20kHz to 200kHz to 400kHz.If use transformer 4, with the switching frequency driving switch element of describing later, with regard to the 20kHz that can realize wishing switch to 200kHz as off-resonance type supply unit with such natural frequency of vibration.If with this frequency drives switch element, just do not have noise, the switching losses of switch element is also little, and is desirable just.
The specification of transformer 4 as shown in figure 10.
[mensuration of the natural frequency of vibration of transformer 4]
In the mensuration of the natural frequency of vibration of transformer 4, use the frequency response analyzer sold on the market ((Co., Ltd.) NF circuit block is made, model FRA5095).Fig. 4 is the figure of the wiring of expression when measuring the natural frequency of vibration of transformer.
Under a secondary side opened state of transformer 4, connect analyzer 31 in an elementary side, change the signal frequency that offer transformer 4 on one side, measure the impedance of transformer 4 on one side, impedance is become great frequency as the natural frequency of vibration.If measure with this method, a plurality of resonance points have then appearred, but in an embodiment, the resonance point of low-limit frequency importantly, this resonance point has showed intrinsic characteristic in the transformer 4 best.The natural frequency of vibration of the transformer 4 that generates with described specification is 88kHz.It should be noted that, also can use other method such as impedometer of selling on the market.
[load]
[confirming operation of supply unit]
Change on one side switching frequency, on one side at (1.0kW/m at strong sunshine
2, 55 ℃ of battery temperatures) under, make the battery power work of embodiment, as shown in Figure 5, than the low slightly switching frequency of the natural frequency of vibration (88kHz), it is the highest that conversion efficiency has reached.When switching frequency is lower than 22kHz or when surpassing 196kHz, conversion efficiency reduces rapidly.From this result as can be known, the frequency field of finding the inventor is that the variation of conversion efficiency is little, has kept high conversion efficiency in 0.25 to 2 times the frequency field of the natural frequency of vibration.Particularly in 0.5 to 1 times frequency field of the natural frequency of vibration, obtained very high conversion efficiency.
The existence of the frequency field that conversion efficiency is good academicly is speculated as: lower limit region is related with non-linear (saturated) of magnetic core, and the rising of the AC resistance of the increase of the idle current that upper limit zone and a lot of high order harmonic component compositions that square wave on being added to transformer comprises cause, the increase of iron loss, electric wire, the loss rising of switch element etc. are relevant.But what the parameter that the not clear in the past efficient of particular transform simply becomes good frequency field is.The inventor finds through further investigation back: by the natural frequency of vibration of transformer as parameter, just can the utmost point the high frequency field of particular transform efficient simply.
When the voltage of primary one side low, electric current is big (in an embodiment, be 1V, 10A) time, and step-up ratio surpasses under 1: 100 the condition, by the parallel connection of primary coil and the high number of turnization of secondary coil, the amount of the electric wire that uses in the transformer increases, and the parasitic capacitance that colonizes in the transformer increases, and becomes the reason that the natural frequency of vibration is descended.In addition,, in magnetic core, use the magnetic material of high permeability, reduce the leaked magnetic flux amount in order to improve conversion efficiency, the coupling that improves elementary inter-stage, but this increases the inductance of an elementary side, further to the directive effect that reduces the natural frequency of vibration.This fact is by the inventor's research clearly, can think: the transformer that the high transformer of step-up ratio and step-up ratio are low is compared, the tendency that exists the frequency field that can obtain high conversion efficiency significantly to narrow down.Therefore, the simple determine switch frequency this point of natural frequency of vibration energy from transformer is very effective.
Below, embodiments of the invention 2 are described.It should be noted that, in the present embodiment,, adopt identical symbol, and omission is elaborated to it structure similarly to Example 1.
Expression in embodiment 2:, also can obtain effect similarly to Example 1 even change the structure of transformer 4 and the circuit structure of a secondary side.
Fig. 6 is the figure of circuit structure of the battery power of expression embodiment 2.
[transformer]
Figure 11 represents the specification of the transformer 4 of embodiment 2.
Measure with method similarly to Example 1, the natural frequency of vibration of the transformer 4 of embodiment 2 is 37kHzs more much lower than the transformer 4 of embodiment 1.It is speculated as: because magnetic core maximizes than the transformer 4 of embodiment 1, and the cause that the inductance of primary coil has increased.
[load]
In embodiment 2, used AC load.Specifically, having utilized resistive element is planar heater (resistance value 1k Ω～10k Ω).
[confirming operation]
Under the condition similarly to Example 1, switching frequency is changed, measured power converter efficient, as shown in Figure 7, than the low slightly switching frequency of the natural frequency of vibration (38kHz), it is the highest that conversion efficiency has reached.And, similarly to Example 1, in the frequency field that the inventor finds, obtained good conversion efficiency.From this result as can be known, even the structural change of the kind of load and transformer in the frequency field that the inventor finds, just can be kept high conversion efficiency if guarantee switching frequency.
Embodiment 3
Below, embodiment 3 is described.It should be noted that, in the present embodiment,, adopt identical symbol and detailed structure similarly to Example 1.
In embodiment 3, illustrate that the main flow that the present invention is applied to present solar power system is the example in the electricity generation system of interconnection type.
Fig. 8 is the figure of circuit structure of the battery power of expression embodiment 3.
Among the embodiment 3,20 battery powers 701 that work as boost converter in parallel offer the converter 13 of interconnection type to its direct current output power, provide alternating electromotive force to system 9.Be that system 9 is loads.It should be noted that battery power 701 is respectively a structure similarly to Example 1 except transformer 4, it is output as 9～10W.Make battery power 701 parallel operations need to import about 100W, be output as the converter of selling on the market of several kW 13 at least and the measure of taking in order to drive.Certainly, if converter with output (about the 10W) balance of battery power 701 is arranged, just need not battery power 701 in parallel.
[transformer]
Figure 12 represents the specification of the transformer 4 of embodiment 3.
The natural frequency of vibration of the transformer 4 of embodiment 3 is more irrelevant greatly than the transformer 4 of embodiment 2 with magnetic core, is the 46kHz also higher than the transformer 4 of embodiment 2.This is speculated as: owing to by using litz wire and method for winding being worked hard (among the embodiment 3, adopted and cut apart coiling), the parasitic capacitance that colonizes in the transformer 4 is diminished.
By method for winding being worked hard and space (Gap and Cavity) being inserted magnetic core, the natural frequency of vibration is changed.Therefore, by fixed switching frequency, the control natural frequency of vibration also can obtain the good battery power of conversion efficiency.But, because the influence of a lot of reasons such as structure that wound the line, so do not resemble the alternation switch frequency simple.
[solar cell principle]
In order to provide from the 10A electric current of solar cell 1 output of low-voltage (1.0V) output, near current-collecting terminals and the transformer 4 that solar cell 1 has is set to transformer 4 with low loss.Specifically, be below the 10cm if be electrically connected the distance of the primary coil of current-collecting terminals and transformer 4, then ease of connection can be suppressed at loss very little.In essence, the resistance value of cutting down the wiring that is used to connect is important, with the wiring connection of enough tubbiness.And, replace solar cell 1 certainly and connect the fuel cell ratio and be easier to, can be used as fuel cell power source and use.
[converter]
Can use many well-known converters to converter 13, but in embodiment 3, used the converter (Canon makes SI-04, specified output 4.5kW) of interconnection type main circuit with full-bridge mode and maximum power control circuit, that sell on the market.Because related less with invention essence is so omitted the detailed description of converter 13 at this.In addition, system 9 is general 60Hz, the system of 200V single-phase three-wire formula.The change ratio of frequency and voltage is easier to, and can select 50Hz, 100V etc. as required.
[confirming operation]
Carry out the confirming operation same with other embodiment, Fig. 9 represents to measure the result to the conversion efficiency of switching frequency.Than the low slightly switching frequency of the natural frequency of vibration (46kHz), it is the highest that conversion efficiency reaches.And, same with other embodiment, confirmed in the frequency field that the inventor finds, to have obtained good conversion frequency.From this result as can be known, though the converter 13 of interconnection type as load, if switching frequency is guaranteed just can keep higher conversion efficiency in the frequency field that the inventor finds.
According to each embodiment of above explanation, just can promptly make the high supply unit of conversion efficiency, improved conversion efficiency, the output of battery power is increased, cost of electricity-generating is descended.And, if, just become open-and-shut power transformation circuit, so can reduce the cost of supply unit with fixing conducting control switch element recently.
Claims (13)
1. supply unit is characterized in that: comprising:
The transformer that step-up ratio is high; With
A plurality of switch elements of 0.25～2 times alternating electromotive force of the natural frequency of vibration of described transformer are provided to the elementary side of described transformer.
2. supply unit according to claim 1 is characterized in that:
The frequency of described alternating electromotive force is 0.5～1 times of the natural frequency of vibration of described transformer.
3. supply unit according to claim 1 is characterized in that:
Recently drive described switch element with fixing conducting.
4. supply unit according to claim 1 is characterized in that: also comprise:
For a described alternating electromotive force that is generated by the direct current power that is input to described device is transformed into the direct current power of given voltage, and connect a plurality of rectifier cells of a secondary side of described transformer.
5. supply unit according to claim 4 is characterized in that:
Described input current electric power is directly provided by solar cell or fuel cell.
6. supply unit according to claim 1 is characterized in that:
Described transformer has centre cap in its elementary side, and described transformer and described a plurality of switch element constitute push-pull switching circuit.
7. supply unit according to claim 1 is characterized in that:
The step-up ratio of described transformer is more than 1: 100.
8. supply unit according to claim 1 is characterized in that:
Described supply unit is not the resonance mode power supply.
9. method for designing is the method for designing of supply unit that has the high transformer of step-up ratio and a plurality of switch elements of alternating electromotive force are provided to the elementary side of transformer, it is characterized in that: may further comprise the steps:
It is the Frequency Design of described alternating electromotive force 0.25～2 times of the natural frequency of vibration of described transformer.
10. method for designing according to claim 9 is characterized in that:
It is the frequency setting of described alternating electromotive force 0.5～1 times of the natural frequency of vibration of described transformer.
11. method for designing according to claim 9 is characterized in that:
Described supply unit is not the resonance mode power supply.
12. a Blast Furnace Top Gas Recovery Turbine Unit (TRT) is characterized in that: comprising:
The described supply unit of claim 1;
The solar cell or the fuel cell of direct current power directly are provided to described supply unit.
13. Blast Furnace Top Gas Recovery Turbine Unit (TRT) according to claim 12 is characterized in that: also comprise:
Direct current power from described supply unit output is transformed to alternating electromotive force, to the power-converting device of AC electric power systems contact.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP136141/2002 | 2002-05-10 | ||
| JP2002136141A JP2003333861A (en) | 2002-05-10 | 2002-05-10 | Power supply and its designing method and power generating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1457128A true CN1457128A (en) | 2003-11-19 |
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ID=29244240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN03123525A Pending CN1457128A (en) | 2002-05-10 | 2003-05-09 | Power supply device and its designing method, generator thereof |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20030210562A1 (en) |
| EP (1) | EP1361653A3 (en) |
| JP (1) | JP2003333861A (en) |
| KR (1) | KR20030087985A (en) |
| CN (1) | CN1457128A (en) |
| AU (1) | AU2003204103A1 (en) |
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2002
- 2002-05-10 JP JP2002136141A patent/JP2003333861A/en not_active Withdrawn
-
2003
- 2003-05-08 US US10/431,452 patent/US20030210562A1/en not_active Abandoned
- 2003-05-08 AU AU2003204103A patent/AU2003204103A1/en not_active Abandoned
- 2003-05-08 EP EP03010375A patent/EP1361653A3/en not_active Withdrawn
- 2003-05-09 CN CN03123525A patent/CN1457128A/en active Pending
- 2003-05-10 KR KR10-2003-0029586A patent/KR20030087985A/en not_active Application Discontinuation
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102474137A (en) * | 2010-06-30 | 2012-05-23 | 松下电器产业株式会社 | Electric power generator and electric power generating system |
| US8952573B2 (en) | 2010-06-30 | 2015-02-10 | Panasonic Intellectual Property Management Co., Ltd. | Power generator and power generation system |
| CN102474137B (en) * | 2010-06-30 | 2015-04-15 | 松下电器产业株式会社 | Electric power generator and electric power generating system |
| CN104184333A (en) * | 2014-01-09 | 2014-12-03 | 深圳市中兴昆腾有限公司 | Push-pull converter |
| CN109716637A (en) * | 2016-09-15 | 2019-05-03 | 派赛公司 | For the current protection integrated transformer driver of DC-DC converter to be isolated |
| CN109716637B (en) * | 2016-09-15 | 2021-09-28 | 派赛公司 | Current protection integrated transformer driver for isolated DC-DC converter |
| CN110518807A (en) * | 2019-08-09 | 2019-11-29 | 深圳市海浦蒙特科技有限公司 | One kind recommending soft switch circuit method for adjusting resonance frequency and system |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003204103A1 (en) | 2003-11-27 |
| EP1361653A3 (en) | 2005-03-23 |
| US20030210562A1 (en) | 2003-11-13 |
| JP2003333861A (en) | 2003-11-21 |
| KR20030087985A (en) | 2003-11-15 |
| EP1361653A2 (en) | 2003-11-12 |
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